Wall plug



NW1,A 1927. 1,647,891

' A. M. SKINNER WALL PLUG Filed Dec. '7,' 1926 `ilatente'cl Nov. 1, 1927.

i" @NU-EEP?{STATS v ALBERT M. SKINNEBp OF WATERTOWN, NEW YORK.

WALL PLUG'.

v Application led December 7, 1926.` Serial No. 153,171.

This invention relates to van i improvedl l nailing plug for use Ain any type ot masonry f. construction The Wall plugs novv in use are either set in place as the masonry is laid` or lofiplug is driven into `a drilled hole either shrinkage or the splintering of brick or' tile around the plug may result in eventual loos.-

`ening of the plug.

kThe purpose ot the present invention is' to oifercoine the above diiiiculties, and this :is accomplished by the use of a plug consistiiigjof a core and a shell, the plug being `.preierably' of Wood and the shell preferably `of metal. The plug andfshell are perma- Qiiently fixed to each' other by interengaging projections and recesses, ythe plugofle'ringy a `hold `for nails and the shell effecting the y `engagement with the vvall.` Since the shell `is of .metal or other tough' nonshrinking Ina-y terial, a permanent engagement With the Wall is thus secured. y

` Apractical embodiment of the invention is illustrated in the accompanying drawin gs, in Wliichf- 0` .'Fig. ll is a longitudinal axial section of a form oiV plug intended to be driven into a hole drilled in the Wall. o, Fig. 2 is a side elevation, partly in sec tion, of the plug shown in Fig. l, on a slighti ly enlarged scale. g Fig. 3 is a perspective view of the metal i Shell. f y

` Fig. 4 is a sectionalvieW, similar toFig. Il, showing a inodied forni of plug which is laid in the joint of the Wall as this is constructed. f

Fig. 5 is a perspective view of the plug show-n in Fig. 4, a portion of the shell being lOrOken away. f 'f g i Fig. 6 is a perspective viewk of another moditied'form of plug. 1

`Rei'erring firstto Figs. l to 3 inclusive, *thel Wall plug is shown as `consisting .ot a Wooden core 9 encased ina corrugated nietal i `shell lO. Preferablyithe core is circumfer-V eiitially ribbed to fit the corrugations on `,the shell and` thus lockvk the'shell and core together. The plug of Fig. l may be formed by Wrapping a strip of corrugated metal around a Wooden plug, orit niay be constructed by slipping a tubular sleeve over the ,plug and then rolling mating corrugations into the core and shell at the same time. The plug of the type shovvnv in Figs. 1, 2 and 3, is intendedto be driven into aidrilled intrisa-i hole. `llhile the corrugated shell Will enter i into frictional contact with the Wall and byA its resulting deformationivill secure a strong grip, l prefer to make use of a cementing material 1l, such as plaster of Paris. Plas-k ter of Paris is preferred because of its propcrty of expanding as it sets. Y A plug so set Will never become loose, since the Wooden core is locked into theinetal` shell and since the metal shell is permanently bonded to the wall. The insertion of nails and screws only increases the tightness of engagement of the e plug to thev iva-ll. y l

yIn Figs.y l and 5 there is illustrated zin-,- other type of plug which isgenerally similar to that shown in Fig; 1l except that it is lattenedoand' widened in order that it may constructed. Aside roin'the general configuratioiiof the plug, it is essentially lthe saine as that shown in Fig-.1.

belaid up' in the masonry yWall as the Wall is je Fig. 6 shows another modiiication in yvhich the Wooden core Qyis enclosed in a Jacket 14 of tubular Wire braid. This is a ypeculiarl good construction, because as the" Wire `fabric is elongated it shrinks and seizes the core tightly and at-`the Sametime its outer surface is so rough as to offer good frictional contact with the ivall and a very good surface for bonding with plaster and the like. n

Various other modifications may be made Within the scope of the Apresent invention.

What is claimed is,- y 1. As: a new article of inanui`acture,k a

Wall plug comprising a core adapted to res ceive nails, and a rough jacket adapted to enter into binding engagement with the Wall,

the exterior of the core` and the interior of, vthe jacket being provided With interengag-` ing projections and recesses.

2. As a newartiole ofinanufacture, a Wall plug comprising a corrugated wooden core and a corrugated metal Jacket encasing said core, the corrugations of the core and terior and exterior faces, and the core and jacket interengaging With each other to fix jacket being locked together' by engugen'lcnt the core Within the jacket. of the core with such projections and re- 10 3. As a new article of manufacture, a Wall cesses. 5 plug comprising a core and a metal jacket In testimony whereof I have signed my encasing the saine, the jacket being formed name to this specification.

with projections and recesses on both its n- ALBERT M. SKINNER. 

